Milton Thiago de Mello (born February 5, 1916) is a veterinarian and the dean of Brazilian primatology. He is a strong voice for biological conservation of Brazil's megadiverse flora and fauna. As a professional veterinarian and zoological researcher, de Mello has received awards and distinctions from many governments and organizations, such as from the , the , the and the John Guggenhiem Memorial. He is an honorary member of the , the American Academy of Microbiology, and the New York Academy of Sciences. He was awarded the Medal of Merit in Veterinary Medicine, at the highest level (Grã-Cruz). He is a consultant with the Pan-American Health Organization and the Food and Agriculture Agency of the United Nations. He belongs to more than 30 Brazilian and international scientific societies,